Dave, its working fine :)
If you use a router to access the internet then it's admin control panel will have settings for primary and secondary DNS numbers. Once you've found those either call your ISP for alternate DNS numbers or Google for alternate ones for your ISP.
I bet there are other sites you can not access too, although you may not have come across them.
When I was with BT internet I had to do the same thing as some site would just seem to disappear from time to time.
If you use a router to access the internet then it's admin control panel will have settings for primary and secondary DNS numbers. Once you've found those either call your ISP for alternate DNS numbers or Google for alternate ones for your ISP.
I bet there are other sites you can not access too, although you may not have come across them.
When I was with BT internet I had to do the same thing as some site would just seem to disappear from time to time.